Molded Case Circuit Breaker 1500V DC 800A 50kA MCCB

Name: Molded Case Circuit Breaker 1500V DC - ETEK Electri
SKU: EKM16DC_MCCB

Engineered for highly demanding new energy applications, this Molded Case Circuit Breaker delivers uncompromising direct current isolation up to 1500V DC. The EKM16DC series functions as an exceptionally robust molded breaker, effortlessly managing massive continuous loads up to 800A to strictly secure commercial photovoltaic arrays and utility-scale wind power systems against devastating short circuits and overloads.

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ModelEKM16DC_MCCB

CategoryMolded Case Circuit Breakers, Circuit Breakers

AvailabilityIn stock

CE & TUV certified
Worldwide shipping
OEM & ODM support

Product Features of the Molded Case Circuit Breaker

Constructed for rigorous electrical environments, this Molded Case Circuit Breaker utilizes an instantaneous electromagnetic release alongside a highly responsive thermal release mechanism.

Extreme High-Voltage Capacity: Operates flawlessly at elevated voltages up to 1500VDC, decisively isolating severe faults with a maximum 50kA ultimate short-circuit breaking capacity (Icu).
Zero Arc Technology: Engineered with a specialized arcing distance of ≤50mm (and ≤100mm for specific high-voltage variants) to safely extinguish high-voltage DC arcs.
Extended Mechanical Lifecycle: Built for massive commercial switching operations, delivering an exceptional mechanical life of up to 20,000 cycles without degradation.
Advanced Isolation Function: Fully integrates reliable circuit isolation capabilities, distinctly marked on the faceplate for instant engineering verification.
Flexible Environmental Tolerance: Operates reliably in ambient temperatures ranging from -45°C to +70°C and at extreme elevations up to 2000m without derating.

Commercial Applications for the Molded Case Circuit Breaker

Deploying the EKM16DC secures vital high-capacity DC nodes, acting as a highly dependable molded breaker for utility-scale electrical infrastructures.

Applications & Use Cases

Utility-Scale Solar Arrays: Functions as the primary molded breaker within central combiner boxes, safely aggregating and isolating the output loading of massive 1500VDC strings.
Wind Power Systems: Secures the internal loading capacity of complex wind turbine generator networks against severe electrical overloads and short circuits.
Industrial Heavy Machinery: Protects specialized manufacturing equipment operating on massive direct currents, ensuring flawless zero-interruption fault isolation.

Technical Specifications with the Molded Case Circuit Breaker

Evaluate the exact voltage ratings and massive breaking capacities below to seamlessly integrate this Molded Case Circuit Breaker into your heavy-duty DC distribution panels.

General & Electrical Data (IEC 60947-2)

Model	EKM16DC-250 / 315		EKM16DC-400 / 400V		EKM16DC-630 / 630V		EKM16DC-800
Model	2P	3P	2P	3P	2P	3P	2P	3P
Rated frame current Inm (A)	250, 315		400		630		800
Rated current In (A)	63 – 315		250 – 400		400 – 630		630 – 800
Rated operational voltage Ue (V)	DC250V, DC500V, DC750V, DC1000V, DC1250V (2P only), DC1500V
Rated insulation voltage Ui (V)	1500
Rated impulse withstand Uimp (kV)	12
Rated ultimate short-circuit breaking capacity Icu (kA)
DC250V / DC500V (2P & 3P)	–	–	25	70	25	70	25	25
DC750V (2P & 3P)	–	–	15	50	15	50	15	15
DC1000V (2P)	15	–	15	–	15	–	15	–
DC1000V (3P)	–	–	–	30	–	30	–	30
DC1250V (2P only)	–	–	–	20	–	20	–	–
DC1500V (2P & 3P)	5	20	10	25	10	25	10	25
Rated service capacity Ics (kA)	100% Icu
Mechanical life (Times)	20,000		15,000		20,000		15,000
Electrical life (Times)	1500		1000		800		1500 (2P), 800 (3P)
Arcing distance (mm)	≤50		≤100

Quick Selection Table

Utilize the configuration codes below to precisely specify the EKM16DC series molded case circuit breaker for your exact commercial power needs.

EKM16DC	630	V	Z	3	300	630
↓	↓	↓	↓	↓	↓	↓	↓
Product code	Frame current	High breaking	Operation mode	Poles	Accessory code	Rated current (A)	Installation method
EKM16DC Series DC MCCB	250, 315, 400, 630, 800	None: No V: High breaking	None: Direct operation P: Electrically operation Z: Turning handle	2P, 3P	See accessory table	63,80,100,125, 140,160,180,200, 225,250,280,300, 315,400,500,630, 700,800	Front connection (optional)

Selection of Cross-sectional Areas of Connecting Busbars and Cables

Ensure optimal power transmission and prevent thermal degradation by utilizing the correct copper busbar or cable cross-sections.

Selection of Busbars
Rated current (A)	63	80	100	125	160	180-225	250	280-300	315-400
Cross-sectional area (mm²)	16	25	35	50	70	95	120	185	185 (280-300A), 240 (315-400A)

Selection of Cable
Rated current (A)	Cross-sectional areas of cables		Copper busbar size
Rated current (A)	Quantity	Sectional area (mm²)	Quantity	Sectional area (mm)
500	2	150	2	30 × 5
630	2	185	2	30 × 8
700	2	240	2	50 × 5
800	2	240	2	50 × 5

Product Protection Requirements for Power Distribution

Rated current (A)	Thermal release (ambient temperature +40°C)		Tripping current of electromagnetic release
Rated current (A)	Non-operation time at 1.05 times rated current (cold state) in hours	Operation time at 1.3 times rated current (hot state) in hours	Tripping current of electromagnetic release
63	≥1	≤1	10 In ± 20%
63 < In ≤ 800	≥2	≤2	10 In ± 20%

Power Loss Table

Model	Current when energized (A)	Total Power Loss for Three-phase/Four-phase (W)
EKM16DC-250	250	40
EKM16DC-315	315	43
EKM16DC-400	400	115
EKM16DC-400V	400	105
EKM16DC-630	630	187
EKM16DC-630V	630	127
EKM16DC-800	800	262

Applicable Working Environment and Compensation Coefficient

Model	Ambient Temperature
Model	+40°C	+45°C	+50°C	+55°C	+60°C	+65°C	+70°C
EKM16DC-250 / 315 / 400	1.0In	1.0In	1.0In	0.95In	0.93In	0.91In	0.88In
EKM16DC-630	1.0In	1.0In	1.0In	0.92In	0.90In	0.89In	0.83In
EKM16DC-800	1.0In	1.0In	1.0In	0.92In	0.89In	0.85In	0.80In